Police investigate the scene of a fatal motorcycle crash at the corner of Fort Washington Ave and W. 178th St. Wednesday night. (Sam Costanza / for New York Daily News)

An illegal cab driver who blew through a red light, killing a 40-year-old motorcyclist in Washington Heights, was charged with criminally negligent homicide, police said Thursday.

Ayman Zarik, heading downtown in his Lincoln Town Car on Forth Washington Ave., sped through the light at W. 178th St. about 9:15 p.m. Wednesday, according to cops.

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Manuel Hernandez was zipping east on W. 178th St. on his Suzuki motorcycle when he collided with Zarik in the intersection. Medics rushed Hernandez, unresponsive and with severe body trauma, to Harlem Hospital, where he died.

Relatives believe Hernandez was returning home from visiting his daughter in Queens when he crashed just a a few blocks from his home.

Zarik, 53, stayed at the scene but police took him into custody after learning his Town Car wasn’t properly registered or insured — and that he was using the vehicle to illegally pick up fares.

Cops also learned the cab’s New Jersey license plates belonged to another car, sources said.

“He had improper plates, no insurance,” the victim’s stepdad raged. “How the hell is he picking up people? That doesn’t make any sense.”

Cruz said Hernandez, who had an 11-year-old son and two infant daughters, was just approved for a mortgage to buy his dream home in New Jersey, relatives said.

“He was a hardworking person. Everyday he would wake up at 4 a.m. and go to New Jersey to work as a truck driver, delivering electrical materials,” Cruz said. “My stepson was full of life and health. It’s sad. You just don’t think something like this can happen.”